|
A dedicated Guide to define your model of actuator
Before starting, let's see the description of the symbology of electric motors according to the standard regulations
Actuator Duty & Modulating Classification
The EN 15714-2 Standard defines 4 actuator duties with basic design requirements per m0vement to operate the valve: part-turn, multi-turn and linear.
|
Class A
On-Off
The actuator is required to drive the valve through its entire travel from the fully open position to the fully closed position or vice-versa.
|
Class B
Inching / Positioning
The actuator is required to occasionally drive the valve to any position.
|
Class C
Modulating
The actuator is required to frequently drive the valve to any position between fully open and fully closed.
|
Class D
Continuous modulating
The actuator is required to continuously drive the valve to any position between fully open and fully closed.
|
Relying on its experience and on years of customers’ feedbacks, we considers that these 4 types of operation must be specified with key criteria in order to define the unique appropriate solution to the process requirement of each customer.
On-Off & Positioning: Increase ENDURANCE
Considering On-Off applications (Class A) and Inching/Positioning applications (Class B), process requirements imply to set ENDURANCE as the decisive criteria. Number of cycles, i.e. life time of the actuator, will make the difference for the customer and his application.
Modulating & Continuous Modulating: Improve PERFORMANCE (Class C and D)
Modulating and Continuous Modulating applications require specific expertise to define the most appropriate solution. Our modulating classification (Class III which complies with EN15714-2 Modulating Class C and Classes II & I which comply with EN15714-2 Continuous modulating Class D) is now well-known from our customers and has, in fact, inspired the EN 15714-2 Standard. Duty PERFORMANCE is the main criterion to fully address modulating process requirements, but needs to be specified and completed with additional performance criteria. For this reason is important to read the actuator manual and its functions.
Sets 4 additional performance criteria to EN15714-2 basic design requirements
- + Resolution
- + Responce Time
- + Dead Band
- + Linearity
These criteria determine the efficiency of the modulating process.
Part - Turn Actuator
|
Class A On - Off
|
|
ON - OFF
Standard Duty Class A
|
EN 15714 - 2
|
|
Torque lbs.in
|
Duty Performance cycles per hour
|
Endurance (1)number of cycles
|
|
< 1115
|
15
|
10 000
|
|
1115-8850
|
10
|
10 000
|
|
8851-35400
|
5
|
5 000
|
|
35401-283200
|
5
|
2 500
|
|
> 283200
|
5
|
1 000
|
|
|
 Class B Inching / Positioning |
|
INCHING / POSITIONING
Standard Duty Class B
|
EN 15714 - 2
|
|
Torque lbs.in
|
Duty Performance starts per hour
|
Endurance (1)number of cycles
|
|
< 1115
|
120
|
10 000
|
|
1115-8850
|
60
|
10 000
|
|
8851-35400
|
30
|
5 000
|
|
35401-283200
|
15
|
2 500
|
|
> 283200
|
5
|
1 000
|
|
DEFINITIONS
- Torque is based on EN ISO 5211
- One cycle consists of nominal 90° angular travel in both directions (i.e. 90° to open + 90° to close), based on an average load of at least 30 % of the rated torque with the ability to Transmit 100 % of the rated torque for at least 5 % at each end of travel. For angular travel other than 90°, the endurance shall be agreed between the purchaser and the manufacturer/supplier.
- One start consists of a movement of at least 1 % in either direction, with a load of at least 30 % of the rated torque.
- TBA: To be agreed between manufacturer / supplier and purchaser.
Design requirements per classes
 Class C
Modulating |
|
MODULATING
Standard Duty Class C
|
EN 15714 - 2
|
|
Torque lbs.in
|
Duty (1) Performance starts per hour
|
Endurance number of starts
|
|
< 1115
|
1 200
|
1 800 000
|
|
1115-8850
|
600
|
1 200 000
|
|
8851-35400
|
300
|
500 000
|
|
35401-283200
|
60
|
250 000
|
|
> 283200
|
30
|
T. B. A.
|
|
|
 Class D
Continuous Modulating |
|
CONTINUOUS MODULATING
Standard Duty Class D
|
EN 15714 - 2
|
|
Torque lbs.in
|
Duty (1) Performance starts per hour
|
Endurance number of starts
|
|
< 1115
|
3 600
|
10 000 000
|
|
1115-8850
|
1 800
|
10 000 000
|
|
8851-35400
|
600
|
5 000 000
|
|
35401-283200
|
N.A.
|
T. B. A.
|
|
> 283200
|
N.A.
|
T. B. A.
|
|
PERFORMANCE CRITERIA
|
MODULATING
Performance Class III
|
Additional performance criteria
|
|
Torque lbs.in
|
Duty (2) Performance starts per hour
|
Endurance number of starts
|
Resolution % and Number step mini
|
Dead band % Maxi
|
Reponse time sec
|
Linearity
%
|
|
< 1115
|
1 200
|
1 800 000
|
<2%
|
50
|
±1%
|
<2s
|
2%
|
|
1115-8850
|
1 200
|
1 200 000
|
<2%
|
50
|
±1%
|
<2s
|
2%
|
|
8851-35400
|
1 200
|
500 000
|
<2%
|
50
|
±1%
|
<2s
|
2%
|
|
35401-283200
|
1 200
|
250 000
|
<2%
|
50
|
±1%
|
<2s
|
2%
|
|
> 283200
|
1 200
|
T. B. A.
|
<2%
|
50
|
±1%
|
<2s
|
2%
|
(2) Duty Performance Higher Level than Standard EN 15714 - 2
|
MODULATING
Performance Class III+
|
Additional performance criteria
|
|
Torque lbs.in
|
Duty (2) Performance starts per hour
|
Endurance (2)number of starts
|
Resolution % and Number step mini
|
Dead band % Maxi
|
Reponse time sec
|
Linearity
%
|
|
< 1115
|
1 200
|
3 000 000
|
<1%
|
100
|
±0.5%
|
<2s
|
2%
|
|
1115-8850
|
1 200
|
2 000 000
|
<1%
|
100
|
±0.5%
|
<2s
|
2%
|
|
8851-35400
|
1 200
|
1 000 000
|
<1%
|
100
|
±0.5%
|
<2s
|
2%
|
|
35401-283200
|
1 200
|
500 000
|
<1%
|
100
|
±0.5%
|
<5s
|
2%
|
|
> 283200
|
1 200
|
T. B. A.
|
<1%
|
100
|
±0.5%
|
<10s
|
2%
|
(2) Duty Performance and Endurance Higher Level than Standard EN 15714 - 2
|
|
|
CONTINUOUS MODULATING
Performance Class II
|
Additional performance criteria
|
|
Torque lbs.in
|
Duty (2) Performance starts per hour
|
Endurance number of starts
|
Resolution % and Number step mini
|
Dead band % Maxi
|
Reponse time sec
|
Linearity
%
|
|
< 1115
|
3 600
|
10 000 000
|
<1.5%
|
67
|
±0.75%
|
<2s
|
2%
|
|
1115-8850
|
1 800
|
10 000 000
|
<1.5%
|
67
|
±0.75%
|
<2s
|
2%
|
|
8851-35400
|
1 800
|
5 000 000
|
<1.5%
|
67
|
±0.75%
|
<2s
|
2%
|
|
35401-283200
|
N.A.
|
T. B. A.
|
<1.5%
|
67
|
±0.75%
|
<2s
|
2%
|
|
> 283200
|
N.A.
|
T. B. A.
|
<1.5%
|
67
|
±0.75%
|
<2s
|
2%
|
(2) Duty Performance Higher Level than Standard EN 15714 - 2
|
CONTINUOUS MODULATING
Performance Class II+
|
Additional performance criteria
|
|
Torque lbs.in
|
Duty (2) Performance starts per hour
|
Endurance (2)number of starts
|
Resolution % and Number step mini
|
Dead band % Maxi
|
Reponse time sec
|
Linearity
%
|
|
< 1115
|
3 600
|
20 000 000
|
<1%
|
100
|
±0.5%
|
<2s
|
2%
|
|
1115-8850
|
1 800
|
20 000 000
|
<1%
|
100
|
±0.5%
|
<2s
|
2%
|
|
8851-35400
|
1 800
|
5 000 000
|
<1%
|
100
|
±0.5%
|
<2s
|
2%
|
|
35401-283200
|
1 200
|
T. B. A.
|
<1%
|
100
|
±0.5%
|
<5s
|
2%
|
|
> 283200
|
1 200
|
T. B. A.
|
<1%
|
100
|
±0.5%
|
<10s
|
2%
|
(2) Duty Performance and Endurance Higher Level than Standard EN 15714 - 2
|
|
<![if !vml]>
<![endif]>CONTINUOUS MODULATING
Performance Class I
|
Additional performance criteria
|
|
Torque lbs.in
|
Duty (2) Performance starts per hour
|
Endurance (2)number of starts
|
Resolution % and Number step mini
|
Dead band % Maxi
|
Reponse time sec
|
Linearity
%
|
|
< 1115
|
3600
|
50 000 000
|
<0.25%
|
400
|
±0.13%
|
<1s
|
2%
|
|
1115-8850
|
1 800
|
50 000 000
|
<0.25%
|
400
|
±0.13%
|
<1s
|
2%
|
|
8851-35400
|
1 800
|
20 000 000
|
<0.25%
|
400
|
±0.13%
|
<1s
|
2%
|
|
35401-283200
|
N.A.
|
T. B. A.
|
<0.25%
|
400
|
±0.13%
|
<2s
|
2%
|
|
> 283200
|
N.A.
|
T. B. A.
|
<0.25%
|
400
|
±0.13%
|
<3s
|
2%
|
|
(2) Duty Performance and Endurance Higher Level than Standard EN 15714 - 2
Multi - Turn Actuator
Class A
On - Off |
|
ON - OFF
Standard Duty Class A
|
EN 15714 - 2
|
|
Torque lbs.in
|
Duty Performance cycles per hour
|
Endurance (1)number of cycles
|
|
< 1115
|
15
|
10 000
|
|
1115-8850
|
10
|
10 000
|
|
8851-35400
|
5
|
5 000
|
|
35401-283200
|
5
|
2 500
|
|
> 283200
|
5
|
1 000
|
|
|
Class B
Inching / Positioning |
|
INCHING / POSITIONING
Standard Duty Class B
|
EN 15714 - 2
|
|
Torque lbs.in
|
Duty Performance starts per hour
|
Endurance (1)number of cycles
|
|
< 1115
|
120
|
10 000
|
|
1115-8850
|
60
|
10 000
|
|
8851-35400
|
30
|
5 000
|
|
35401-283200
|
15
|
2 500
|
|
> 283200
|
5
|
1 000
|
|
 ENDURANCE CRITERIA |
|
ON - OFF
Endurance Class A
|
|
Torque lbs.in
|
Duty Performance cycles per hour
|
Endurance (1)number of cycles
|
|
< 1115
|
15
|
10 000
|
|
1115-8850
|
10
|
10 000
|
|
8851-35400
|
5
|
5 000
|
|
35401-283200
|
5
|
2 500
|
|
> 283200
|
5
|
1 000
|
|
|
 ENDURANCE CRITERIA |
|
INCHING / POSITIONING
Endurance Class B
|
|
Torque lbs.in
|
Duty Performance starts per hour
|
Endurance (1)number of cycles
|
|
< 1115
|
120
|
10 000
|
|
1115-8850
|
60
|
10 000
|
|
8851-35400
|
30
|
5 000
|
|
35401-283200
|
15
|
2 500
|
|
> 283200
|
5
|
1 000
|
|
|
(1) Endurance Test Requirement Standard EN 15714 - 2
|
|
(1) Endurance Test Requirement Standard EN 15714 - 2 |
 ENDURANCE CRITERIA |
|
ON - OFF
Endurance Class A+
|
|
Torque lbs.in
|
Duty Performance cycles per hour
|
Endurance (2)number of cycles
|
|
< 1115
|
15
|
100 000
|
|
1115-8850
|
10
|
30 000
|
|
8851-35400
|
5
|
10 000
|
|
35401-283200
|
5
|
5 000
|
|
> 283200
|
5
|
2 000
|
|
|
 ENDURANCE CRITERIA
|
INCHING / POSITIONING
Endurance Class B+
|
|
Torque lbs.in
|
Duty Performance starts per hour
|
Endurance (2)number of cycles
|
|
< 1115
|
120
|
100 000
|
|
1115-8850
|
60
|
30 000
|
|
8851-35400
|
30
|
10 000
|
|
35401-283200
|
15
|
5 000
|
|
> 283200
|
5
|
2 000
|
|
| (2) Endurance Higher Level than Standard EN 15714 - 2 |
|
(2) Endurance Higher Level than Standard EN 15714 - 2 |
DEFINITIONS
- Torque is based on EN ISO 5211
- One cycle consists of nominal 90° angular travel in both directions (i.e. 90° to open + 90° to close), based on an average load of at least 30 % of the rated torque with the ability to transmit 100 % of the rated torque for at least 5 % at each end of travel. For angular travel other than 90°, the endurance shall be agreed between the purchaser and the manufacturer/supplier.
- One start consists of a movement of at least 1 % in either direction, with a load of at least 30 % of the rated torque.
- TBA: To be agreed between manufacturer / supplier and purchaser.
Design requirements per classes
Class C
Modulating |
|
MODULATING
Standard Duty Class C
|
EN 15714 - 2
|
|
Torque lbs.in
|
Duty (1) Performance starts per hour
|
Endurance number of starts
|
|
< 1115
|
1 200
|
1 800 000
|
|
1115-8850
|
600
|
1 200 000
|
|
8851-35400
|
300
|
500 000
|
|
35401-283200
|
60
|
250 000
|
|
> 283200
|
30
|
T. B. A.
|
|
|
Class D
Continuous Modulating |
|
CONTINUOUS MODULATING
Standard Duty Class D
|
EN 15714 - 2
|
|
Torque lbs.in
|
Duty (1) Performance starts per hour
|
Endurance number of starts
|
|
< 1115
|
3 600
|
10 000 000
|
|
1115-8850
|
1 800
|
10 000 000
|
|
8851-35400
|
600
|
5 000 000
|
|
35401-283200
|
N.A.
|
T. B. A.
|
|
> 283200
|
N.A.
|
T. B. A.
|
|
| (1) Duty Performance Standard EN 15714 - 2 |
|
(1) Duty Performance Standard EN 15714 - 2 |
 PERFORMANCE CRITERIA |
|
MODULATING
Performance Class III
|
Additional performance criteria
|
|
Torque lbs.in
|
Duty (2) Performance starts per hour
|
Endurance number of starts
|
Resolution % and Number step mini
|
Dead band % Maxi
|
Reponse time sec
|
Linearity
%
|
|
< 890
|
1 200
|
1 800 000
|
<2%
|
50
|
±1%
|
<2s
|
2%
|
|
891-6,200
|
1 200
|
1 200 000
|
<2%
|
50
|
±1%
|
<2s
|
2%
|
|
6,201-22,120
|
300
|
500 000
|
<2%
|
50
|
±1%
|
<2s
|
2%
|
|
22,121-88,500
|
60
|
250 000
|
<2%
|
50
|
±1%
|
<2s
|
2%
|
|
> 88,500
|
30
|
T. B. A.
|
<2%
|
50
|
±1%
|
<2s
|
2%
|
|
|
 PERFORMANCE CRITERIA |
|
CONTINUOUS MODULATING
Performance Class II
|
Additional performance criteria
|
|
Torque lbs.in
|
Duty Performance starts per hour
|
Endurance (2)number of starts
|
Resolution % and Number step mini
|
Dead band % Maxi
|
Reponse time sec
|
Linearity
%
|
|
< 890
|
3 600
|
10 000 000
|
<1.5%
|
67
|
±0.75%
|
<2s
|
2%
|
|
891-6,200
|
1 800
|
10 000 000
|
<1.5%
|
67
|
±0.75%
|
<2s
|
2%
|
|
6,201-22,120
|
600
|
5 000 000
|
<1.5%
|
67
|
±0.75%
|
<2s
|
2%
|
|
22,121-88,500
|
N.A.
|
T. B. A.
|
<1.5%
|
67
|
±0.75%
|
<2s
|
2%
|
|
> 88,500
|
N.A.
|
T. B. A.
|
<1.5%
|
67
|
±0.75%
|
<2s
|
2%
|
|
|
(2) Duty Performance Higher Level than Standard EN 15714 - 2
|
|
(2) Endurance Test Requirement Standard EN 15714 - 2 |
 PERFORMANCE CRITERIA |
|
MODULATING
Performance Class III+
|
Additional performance criteria
|
|
Torque lbs.in
|
Duty (2) Performance starts per hour
|
Endurance (2)number of starts
|
Resolution % and Number step mini
|
Dead band % Maxi
|
Reponse time sec
|
Linearity
%
|
|
< 890
|
1 200
|
3 000 000
|
<1%
|
100
|
±0.5%
|
<2s
|
2%
|
|
891-6,200
|
1 200
|
2 000 000
|
<1%
|
100
|
±0.5%
|
<2s
|
2%
|
|
6,201-22,120
|
300
|
1 000 000
|
<1%
|
100
|
±0.5%
|
<2s
|
2%
|
|
22,121-88,500
|
60
|
500 000
|
<1%
|
100
|
±0.5%
|
<5s
|
2%
|
|
> 88,500
|
30
|
T. B. A.
|
<1%
|
100
|
±0.5%
|
<10s
|
2%
|
|
|
 PERFORMANCE CRITERIA |
|
CONTINUOUS MODULATING
Performance Class II+
|
Additional performance criteria
|
|
Torque lbs.in
|
Duty Performance starts per hour
|
Endurance (2)number of starts
|
Resolution % and Number step mini
|
Dead band % Maxi
|
Reponse time sec
|
Linearity
%
|
|
< 890
|
3 600
|
20 000 000
|
<1%
|
100
|
±0.5%
|
<2s
|
2%
|
|
891-6,200
|
1 800
|
10 000 000
|
<1%
|
100
|
±0.5%
|
<2s
|
2%
|
|
6,201-22,120
|
600
|
5 000 000
|
<1%
|
100
|
±0.5%
|
<2s
|
2%
|
|
22,121-88,500
|
N.A.
|
T. B. A.
|
<1%
|
100
|
±0.5%
|
<5s
|
2%
|
|
> 88,500
|
N.A.
|
T. B. A.
|
<1%
|
100
|
±0.5%
|
<10s
|
2%
|
|
|
(2) Duty Performance and Endurance Higher Level than Standard EN 15714 - 2
|
|
(2) Endurance Higher Level than Standard EN 15714 - 2 |
 PERFORMANCE CRITERIA |
|
CONTINUOUS MODULATING
Performance Class II+
|
Additional performance criteria
|
|
Torque lbs.in
|
Duty Performance starts per hour
|
Endurance (2)number of starts
|
Resolution % and Number step mini
|
Dead band % Maxi
|
Reponse time sec
|
Linearity
%
|
|
< 890
|
3 600
|
20 000 000
|
<1%
|
100
|
±0.5%
|
<2s
|
2%
|
|
891-6,200
|
1 800
|
10 000 000
|
<1%
|
100
|
±0.5%
|
<2s
|
2%
|
|
6,201-22,120
|
600
|
5 000 000
|
<1%
|
100
|
±0.5%
|
<2s
|
2%
|
|
22,121-88,500
|
N.A.
|
T. B. A.
|
<1%
|
100
|
±0.5%
|
<5s
|
2%
|
|
> 88,500
|
N.A.
|
T. B. A.
|
<1%
|
100
|
±0.5%
|
<10s
|
2%
|
|
(2) Endurance Higher Level than Standard EN 15714 - 2
Linear Actuator
Class A
On - Off |
|
ON - OFF
Standard Duty Class A
|
EN 15714 - 2
|
|
Thrust lbf
|
Duty Performance running time/hour
|
Endurance (1)number of cycles
|
|
<4700
|
15
|
10 000
|
|
4700 to 15700
|
10
|
10 000
|
|
15700 to 33700
|
5
|
5 000
|
|
33701 to 73000
|
5
|
2 500
|
|
>73000
|
5
|
1 000
|
|
|
Class B
Inching / Positioning |
|
INCHING / POSITIONING
Standard Duty Class B
|
EN 15714 - 2
|
|
Thrust lbf
|
Duty Performance starts per hour
|
Endurance (1)number of cycles
|
|
<4700
|
30
|
10 000
|
|
4700 to 15700
|
15
|
10 000
|
|
15700 to 33700
|
10
|
5 000
|
|
33701 to 73000
|
10
|
2 500
|
|
>73000
|
10
|
1 000
|
|
DEFINITIONS
- Thrust is based on EN ISO 5210
- One cycle consists in a stroke of 40 mm, or in a minimum stroke (H) given in Table 5, in both directions (i.e. 40 mm to open + 40 mm to close), based on an average load of at least 30 % of the rated thrust with the ability to transmit 100 % of the rated thrust for at least 10 % of the travel.
- One start consists of a movement of at least 1 % of the stroke in either direction, with a load of at least 30 % of the rated thrust.
- TBA: To be agreed between manufacturer / supplier and purchaser.
Design requirements per classes
Class C
Modulating |
|
MODULATING
Standard Duty Class C
|
EN 15714 - 2
|
|
Thrust lbf
|
Duty (1) Performance starts per hour
|
Endurance number of starts
|
|
<4700
|
1 200
|
1 800 000
|
|
4700 to 15700
|
600
|
1 200 000
|
|
15700 to 33700
|
60
|
500 000
|
|
33701 to 73000
|
60
|
250 000
|
|
>73000
|
60
|
T. B. A.
|
|
|
Class D
Continuous Modulating |
|
CONTINUOUS MODULATING
Standard Duty Class D
|
EN 15714 - 2
|
|
Thrust kN
|
Duty Performance starts per hour
|
Endurance (1)number of starts
|
|
<4700
|
3 600
|
10 000 000
|
|
4700 to 15700
|
1 800
|
10 000 000
|
|
15700 to 33700
|
T. B. A.
|
5 000 000
|
|
33701 to 73000
|
T. B. A.
|
T. B. A.
|
|
>73000
|
T. B. A.
|
T. B. A.
|
|
For more detalis please read the Ranges Overview here
|
